Incandescent gas-lamp.



PATENTED NOV. 12, 1907.

0. WIBDERHOLD. INOANDESGENT GAS LAMP.

APPLICATION FILED MAR. 3, .1906.

. WITNESSES:

ATTORNEYS UNITED STATES PATENT orrron.

INCANDESCENT GAS-LAMP.

Specification of Letters Patent.

Patented Nov. 12, 1907.

Application filed March 3. 1906. Serial No. 303,942.

To all whom it may concern:

Be it known that I, OSCAR WIEDERHOLD, a citizen of the United States, and a resident of Jersey City, in the county ofHudson and State of New Jersey, have invented certain new and useful Improvements in Incandescent Gas-Lamps, of which the following is a specification.

My invention relates to incandescent gas lamps particularly of the inverted type, and has for its object to provide certain improvements, whereby the efiiciency of such lamps is increased, as will be fully described hereinafter, and particularly pointed out in the appended claims.

Reference is to be had to the accompanying drawing in which Figure 1 is a sectional elevation of a lamp embodying my improvements. Fig. 2 is a plan view thereof with parts broken away and certain portions shown in section, Fig. 3 is an enlarged sectional view showing the means employed by me for preventing an escape of the gas into the room, and Fig. 4 is a perspective view of the mantle holder.

Aindicates a bracket formed on a gas supply pipe and adapted to support the entire lamp.

B indicates a lever of any approved style for operating the valve or cock which controls the passage of gas from the bracket A to the burner.

G are ports through which the air enters the gas tube 0, having a tapering portion as shown.

D indicates a milled collar attached to any suitable regulating device, the details of which I have not shown for the reason that such devices arewell known in the art. I

The tapering portion of the gas tube 0 and the end portion thereof form a means for centering and supporting the gas conveying tube or mixing tube E, which is given the laterally-bent or curved, gooseneck shape shown so as to clear the globe F of the lamp. The lower end of the mixing tube E has a bell-shaped mouth E secured thereto, which mouth extends partly over the air openings 0. The objectof this construction is to prevent the escape of any gas which may leak down past the joint of the mixing tube E with the gas tube 0. Any gas so escaping will not be allowed to spread in the room, but will be drawn by suction into the air ports 0 and thus returned to the gas conveying tube In this manner a contamination of the air of the room by escaping gas is prevented.

The upper end of the mixing tube E communicates with a regenerative chamber G, the lower portion G of which preferably tapers downward, and is adapted to receive the burner tip H. In the construction shown the tip screws on the lower end of the regenerative chamber, and is provided with a spiral rib H to receive the carrier or holder I of the mantle J. The mantle holder, is preferably provided with an inwardly projected flange I; by cutting the said flange radially as at I and then bending one portion of the flange relatively to the other, I form a spiral corresponding to the spiral rib H, this being a convenient and inexpensive manner of producing a spiral thread on the mantle holder to match the thread on the gas tip.

The regenerative chamber is preferably made of two sections, between which is located a sieve K oi a comparatively large surface, which is obtained by corrugating the sieve so as to give it an undulating shape; for instance, there may be a central knob K surrounded by a groove and a ridge K said knob extending toward the inlet of the regenerative chamber.

To the regenerative chamber is secured, by means of a spider L, a shell L, provided with screws L'-, serving to hold the globe when an open globe is employed. When however, the globe used is closed at the bottom as shown for the globe F, the screws L serve to hold a ring M, having a horizontal portion M, provided with air inlets M and a vertical flange M, through which pass screws M ior holding the globe F. At a point which is on the supply side of the valve controlled by the lever B, a branch tube N is projected upward from the bracket A, and the upper end of said branch tube terminates in the neighborhood of the mantle .T

to form a pilot burner N, which will be kept permanently lighted. A very small opening in the bottom of the globe F will suflice for the passage of the branch tube N. This tube by projecting upward through the globe also assists in steadying it.

The pilot burner N will always be lighted and upon opening the valve controlled by the lever B gas will pass through the tubes 0 and E into the regenerative chamber G, receiving an admixture of air through the ports C. Any gas escaping at the joint of the tubes 0 and E will, as hereinbeiore described, be so directed by the bell-shaped mouth E as to be sucked back into the tubes C, E through the ports C. The mixture of air and gas will pass into the regenerative chamber, which 'is highly heated by the products of combustion passing up from the main burner through the annular space between said chamber and the shell L. The heat is conveyed to the gas and air mixture with particular efficiency owing to the use of the corrugated metallic sieve K, which not only presents a very large heating surface, but also compels the air and gas to be subdivided into a large number of fine streams. "his preheated mixture of air and gas is then ignited by the pilot burner (or in the usual way if the pilot burner should be omitted) and brings the mantle J to incandescence in the well known manner. An additional amount of air to support combustion enters through the ports 'M when the closed globe is used, and this current of cold air surrounds the upward current of combustion products, which pass upward along the regenerative chamber. The current of cold air cools the horizontal portion M and the vertical portion M of the ring M with the screws M and the upper portion of the globe F, thus preventing a cracking of the globe.

I claim:

1. The combination with a burner tip having a screw thread formed thereon, of a mantle holder provided with a flange cut and bent to form a spiral adapted to fit said screw thread.

2. The combination with a burner tip having an external screw thread, of a mantle holder provided with an inwardly projected flange cut and bent to form a spiral adapted to fit said screw thread.

3. The combination of the arm or bracket, the mixing tube, the lower end of which is supported on said bracket, the body of said tube being bent laterally, a regenerative chamber connected with the upper end of the mixing tube v and located vertically above the lower end of said tube,

a burner tip connected with said chamber, a globe support surrounding said chamber, and a globe carried by said support and projecting into the bend of the mixing tube.

4. The combination with the gas bracket or arm having a cock and an upwardly-extending pilot branch tube connected with the gas arm on the supply side of said cock, a mixing tube connected with the gas arm on the delivery side of said cock, a burner connected with the delivery end of said mixing tube, a globe holder, a mantle holder connected with the burner and a globe carried by said globe holder and inclosing the upper portion of the pilot branch tube.

5. The combination of the gooseneck tube, the globesupport carried thereby, the globe depending from said support, and the ,pilot burner tube extending upward through the globe.

In testimony whereof, I have hereunto signed my name in the presence of two subscribing witnesses.

OSCAR WIEDERHOLD. 

